DG8SAQ VNWA 3 Expansion PCB (Retro fitting existing VNWA 3)

Optional board converting VNWA3  to VNWA 3+  offering following functionality:

• 2nd Audio Codec allowing S11 and S21 measurements to be performed in a single sweep instead of 2 sweeps.
• Reduced to from 0.41 Amp without Expansion board to 0.33 Amp despite additional power consumption of 2nd Audio Codec on the Expansion board.
• RJ11 connector making the VNWA3 control signals and power accessible externally
• Option to obtain the multiplied 12 MHz internal TCXO clock or to feed in an external 36 MHz clock source.
  


• Link the the VNWA 3 Expansion board Manual: 
  http://sdr-kits.net/VNWA/VNWA_3_Expansion_board.pdf
  

VNWA 3 Expansion board fitting:

• VNWA 3 with serial numbers of A2200 and below:  Retro fitting the Expansion board will require soldering of the SIP connectors to the Main PCB assembly and removal of a resistor. Soldering should only be carried out by persons who have the required skills and previous experience of this type of work. See the VNWA 3 Expansion board Manual for details.  
  Note - fitting the optional SMA external clock connector requires drilling of a 8mm hole in  the Main chassis.
  
  
• VNWA 3 with serial numbers of A2201 and higher: Retro fitting the VNWA 3 Expansion board consists of plugging in the Expansion Board and removing a SMD jumper on the main PCB using a soldering iron. See the VNWA 3 Expansion board Manual for details.
  Note: - a 8mm hole is already present for fitting optional SMA external external clock connector.